diff --git a/squirrelbattle/mapgeneration/broguelike.py b/squirrelbattle/mapgeneration/broguelike.py
index 2425df7..e3f86a7 100644
--- a/squirrelbattle/mapgeneration/broguelike.py
+++ b/squirrelbattle/mapgeneration/broguelike.py
@@ -208,8 +208,9 @@ class Generator:
         # place an exit ladder
         y, x = randint(0, height - 1), randint(0, width - 1)
         while level[y][x] != Tile.FLOOR or \
-                any([t.is_wall() for t in Map.neighbourhood(level, y, x, large=True)]):
+                any([level[j][i].is_wall() for j, i
+                     in Map.neighbourhood(level, y, x, large=True)]):
             y, x = randint(0, height - 1), randint(0, width - 1)
-        level[sy][sx] = Tile.LADDER
+        level[y][x] = Tile.LADDER
 
         return Map(width, height, level, sy, sx)